Scroll to see break-even price per barrel for oil in 2015 for select oil producers, and click on a country's name for more details. modest oil-price recovery and currency devaluations have lowered breakeven prices for countries like Russia and Nigeria, but some petrostates still need oil prices above $100 a barrel to balance their budgets.
There are dozens of types of gemstones â including diamonds, colored gemstones, and pearls â each with a unique set of physical and optical properties. GIRDLE â The narrow band around the perimeter of a polished or faceted diamond or colored gemstone.
Gemstone size is usually measured in carats,a unit of weight,althoughmilli-meter sizeis sometimesused.Five carats is equal to 1gram and approximately 28Yq gramsis equal to 1 ounce avoirdu-pois.Oneone-hundredth (0.01)of a carat is called a point, andthis term isoftenused,especiallypertaining to very small gemstones.